Two-dimensional metal organic skeleton composite membrane material, and preparation method and application
A metal-organic framework and composite membrane technology, applied in the fields of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve problems such as poor dispersion, poor membrane hydrophilicity, and low membrane efficiency, and achieve Increased adsorption capacity, improved cross-linking and sedimentation, and extended service life
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[0040] Example 1
[0041] The preparation method of the two-dimensional metal organic framework composite membrane material of this embodiment includes the following steps:
[0042] (1) After mixing and dissolving zinc acetate, dimethylimidazole and N,N'-dimethylformamide in a molar ratio of 0.8:0.3:110, react at room temperature for 1 day, and the resulting mixed product is treated with water and methanol After repeated washing, the solid product is separated and dried to obtain granular ZIFs;
[0043] (2) After mixing the granular ZIFs, ethanol and n-hexane in a molar ratio of 0.23:225:250, grinding and reacting at room temperature for 3 hours, the resulting colloidal solution is chemically settled to separate the upper suspended matter, and dried to obtain two Dimensional metal organic framework coordination polymer;
[0044] (3) Mix polyvinylpyrrolidone, polyvinylidene fluoride, dimethylacetamide, and potassium chloride in a molar ratio of 0.3:7.5:36. After heating and stirring a...
Example Embodiment
[0046] Example 2
[0047] The preparation method of the two-dimensional metal organic framework composite membrane material of this embodiment includes the following steps:
[0048] (1) After mixing and dissolving zinc acetate, dimethylimidazole and N,N'-dimethylformamide in a molar ratio of 1.2:0.7:150, react at room temperature for 2 days, and the resulting mixed product is treated with water and methanol After repeated washing, the solid product is separated and dried to obtain granular ZIFs; figure 2 Shown: XRD test and analysis of the granular ZIFs show that the granular ZIFs have an octahedral structure and the lattice configuration is 2MI-Zn-2MI.
[0049] (2) After mixing the granular ZIFs, ethanol, and n-hexane in a molar ratio of 0.35:235:260, grinding and reacting at room temperature for 2 hours, the resulting colloidal solution is chemically settled to separate the upper suspension, and dried to obtain two Dimensional metal organic framework coordination polymer; such as...
Example Embodiment
[0057] Example 3
[0058] The preparation method of the two-dimensional metal organic framework composite membrane material of this embodiment includes the following steps:
[0059] (1) After mixing and dissolving zinc acetate, dimethylimidazole and N,N'-dimethylformamide in a molar ratio of 1.0:0.5:130, react for 1.5 days at room temperature, and the resulting mixed product is repeated with water and methanol After washing, the solid product is separated and dried to obtain granular ZIFs;
[0060] (2) After mixing granular ZIFs, ethanol, and n-hexane in a molar ratio of 0.27:231:256, grinding and reacting for 1 hour at room temperature, the resulting colloidal solution is chemically settled to separate the upper suspension, and dried to obtain two Dimensional metal organic framework coordination polymer;
[0061] (3) Mix the polyvinylpyrrolidone, polyvinylidene fluoride, dimethylacetamide, and potassium chloride in a molar ratio of 0.5:8.6:37, heat and stir at 80°C for 24 hours, the...
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